Background recoverer is now enabled by default and configured with the new property Configuration.backgroundRecoveryIntervalSeconds.
The backgroundRecoveryInterval property has been depecated.

Resources which cannot be recoverer during startup now don't prevent the transaction manager from starting up but are simply marked
as 'failed'. Failed resources cannot be used and are automatically retried by the background recoverer.
This supercedes the 'retryUnrecoverableResourcesRegistrationInterval' configuration property which has been removed.